Hi,
1) What is the basis benefit to use the symantec endpoint encryption?
--> Security, it keeps data protected using encryption technologies. It assures you no one else can access your data & it's highly impossible to hack encryption key.
Yes, it's similar to Microsoft safeboot but Symantec Drive Encryption provides organizations with comprehensive, high performance full disk encryption for all data (user files, swap files, system files, hidden files, etc.) on desktops, laptops, and removable media.
This full disk encryption software protects data from unauthorized access, providing strong security for intellectual property, customer, and partner data. Protected systems can be centrally managed by Symantec Encryption Management Server simplifying deployment, policy creation, distribution, and reporting.
Reference link:
http://www.symantec.com/encryption
http://www.symantec.com/drive-encryption
http://buy.symantec.com/estore/categoryDetailPage/productCode/PGP-DRE-EXP-LEM_Vx_12MO_PC/skuType/Product
http://buy.symantec.com/estore/categoryDetailPage/productCode/PGP-DEE-EXP-LEM_Vx_12MO_PC/skuType/Product
Pricing info is available here:http://www.symantec.com/drive-encryption/pricing